Sandbox

SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  IF(
    shared_descr.product_id IS NOT NULL, 
    shared_descr.product, descr1.product
  ) as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id, 
  cscart_ec_table_booking_system.booking_type as booking_type 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ult_product_descriptions shared_descr ON shared_descr.product_id = products.product_id 
  AND shared_descr.company_id = 1 
  AND shared_descr.lang_code = 'en' 
  LEFT JOIN cscart_ec_table_booking_system ON cscart_ec_table_booking_system.product_id = products.product_id 
WHERE 
  1 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  products.timestamp desc, 
  products.product_id ASC 
LIMIT 
  0, 96

Query time 0.00339

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "27.36"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "companies",
              "access_type": "system",
              "possible_keys": [
                "PRIMARY"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.20",
                "prefix_cost": "0.00",
                "data_read_per_join": "5K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ]
            }
          },
          {
            "table": {
              "table_name": "shared_descr",
              "access_type": "system",
              "possible_keys": [
                "PRIMARY",
                "product_id",
                "company_id"
              ],
              "rows_examined_per_scan": 0,
              "rows_produced_per_join": 1,
              "filtered": "0.00",
              "const_row_not_found": true,
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.20",
                "prefix_cost": "0.00",
                "data_read_per_join": "3K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "company_id",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "ALL",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "rows_examined_per_scan": 83,
              "rows_produced_per_join": 3,
              "filtered": "4.00",
              "cost_info": {
                "read_cost": "19.42",
                "eval_cost": "0.66",
                "prefix_cost": "20.08",
                "data_read_per_join": "8K"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "(((`atulecarter_atul_demo5`.`cscart_categories`.`usergroup_ids` = '') or find_in_set(0,`atulecarter_atul_demo5`.`cscart_categories`.`usergroup_ids`) or find_in_set(1,`atulecarter_atul_demo5`.`cscart_categories`.`usergroup_ids`)) and (`atulecarter_atul_demo5`.`cscart_categories`.`status` in ('A','H')) and (`atulecarter_atul_demo5`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "atulecarter_atul_demo5.cscart_categories.category_id"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 6,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "3.46",
                "eval_cost": "1.33",
                "prefix_cost": "24.87",
                "data_read_per_join": "106"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "status",
                "idx_parent_product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "atulecarter_atul_demo5.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "9.56",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.13",
                "prefix_cost": "26.19",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "timestamp",
                "usergroup_ids",
                "parent_product_id"
              ],
              "attached_condition": "((`atulecarter_atul_demo5`.`products`.`company_id` = '1') and (`atulecarter_atul_demo5`.`products`.`parent_product_id` = 0) and ((`atulecarter_atul_demo5`.`products`.`usergroup_ids` = '') or find_in_set(0,`atulecarter_atul_demo5`.`products`.`usergroup_ids`) or find_in_set(1,`atulecarter_atul_demo5`.`products`.`usergroup_ids`)) and (`atulecarter_atul_demo5`.`products`.`status` = 'A'))"
            }
          },
          {
            "table": {
              "table_name": "cscart_ec_table_booking_system",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "4",
              "ref": [
                "atulecarter_atul_demo5.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.13",
                "prefix_cost": "26.32",
                "data_read_per_join": "111"
              },
              "used_columns": [
                "product_id",
                "booking_type"
              ],
              "attached_condition": "<if>(is_not_null_compl(cscart_ec_table_booking_system), (`atulecarter_atul_demo5`.`cscart_ec_table_booking_system`.`product_id` = `atulecarter_atul_demo5`.`products_categories`.`product_id`), true)"
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "atulecarter_atul_demo5.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.13",
                "prefix_cost": "26.45",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "usergroup",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "atulecarter_atul_demo5.products_categories.product_id"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 1,
              "filtered": "92.12",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.66",
                "eval_cost": "0.23",
                "prefix_cost": "27.37",
                "data_read_per_join": "28"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`atulecarter_atul_demo5`.`prices`.`lower_limit` = 1) and (`atulecarter_atul_demo5`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          }
        ]
      }
    }
  }
}

Result

product_id	product	company_name	product_type	booking_type
278	T-shirt, Color: White	CS-Cart	P
280	T-shirt, Color: Black	CS-Cart	P
282	T-shirt, Color: Blue	CS-Cart	P
247	Nokia N1 Pad 7.9" Quad-Core 64bit 2.3GHz 2GB 32GB Android 5.0	CS-Cart	P
248	X-Box One	CS-Cart	P
241	Apple® - iPad® with Retina® display Wi-Fi - 32GB - White	CS-Cart	P
244	Packard Bell OneTwo	CS-Cart	P
245	Apple - iPhone 5c 32GB Cell Phone - Green	CS-Cart	P
246	GoPro - Hero3+ Black Edition Camera	CS-Cart	P
240	Apple® - iPad® with Retina® display Wi-Fi - 64GB - Black	CS-Cart	P
6	Toshiba 32C120U 32" Class 720P HD LCD TV	CS-Cart	P
66	XRS 9970G	CS-Cart	P
166	Nikon 1 J1 Two-Lens Wide Angle Kit Red	CS-Cart	P
214	ASUS CP6130	CS-Cart	P
219	Series 3 15.6" Laptop	CS-Cart	P
221	Series 9 13.3" Laptop	CS-Cart	P
223	Samsung Galaxy Tab 8.9 (Wi-Fi Only) - 32GB Metallic Gray	CS-Cart	P
192	Black and White America (CD Pack)	CS-Cart	P
194	U218 Singles (U2TCD020)	CS-Cart	P
195	Crossroads Guitar Festival 2010 (2DVD)	CS-Cart	P
196	Feeding the Monkies At Ma Maison (Zappa)	CS-Cart	P
197	Guitar Man Album Artwork	CS-Cart	P
198	B.B. King One Kind Favor CD Grammy Award Winning CD Manufacturer: Geffen Records Sku: BBK-11ONEKINDFAVORCD Reviewed 2 times	CS-Cart	P
199	B.B. King - Original Greatest Hits CD	CS-Cart	P
200	John Rutter - The Colours of Christmas	CS-Cart	P
201	Beethoven Piano Concertos Nos. 1 & 2	CS-Cart	P
202	New Year's Concert 2011 Diverse Klassik Welser-moest / Wiener Philharmoniker	CS-Cart	P
203	New Year's Concert 2012 Diverse Wr.Philharmoniker / Jansons,M. / Wr.Sän	CS-Cart	P
204	The Police - The Stewart Copeland Anthology	CS-Cart	P
205	DIR-657 HD Media Router 1000	CS-Cart	P
206	RT-N66U Dual-Band Wireless-N900 Gigabit Router	CS-Cart	P
207	Asus USB-N53	CS-Cart	P
208	H.264 Megapixel Surveillance Camera TL-SC3430	CS-Cart	P
209	HP Scanjet G3110 Scanner	CS-Cart	P
210	HP Photosmart Plus e-All-in-One Printer - B210a	CS-Cart	P
211	HP Officejet Pro 8600 Premium e-All-in-One Printer	CS-Cart	P
212	Panasonic KX-MB2000 24PPM 3-in-1 Monochrome Laser MFP	CS-Cart	P
213	Intel® Boxed Intel® Core™ i7-2600	CS-Cart	P
215	Intel® Core™ i7 processor Extreme Edition 980X – i7-980X	CS-Cart	P
217	ASUS CP6230	CS-Cart	P
218	ASUS Essentio CP1130	CS-Cart	P
220	Series 7 Chronos 14” Notebook	CS-Cart	P
222	Series 3 15.6" Laptop	CS-Cart	P
224	Samsung Galaxy Tab™ 8.9 (AT&T)	CS-Cart	P
225	Samsung Galaxy Tab™ 7.0" (Verizon)	CS-Cart	P
226	Intel® Core™ i7 Processor i7-950	CS-Cart	P
227	Acer 3D Series HN274H bmiiid	CS-Cart	P
228	LG D2342P-PN	CS-Cart	P
229	HP 2711x 27" LED Monitor	CS-Cart	P
230	2011 Pit Boss	CS-Cart	P
231	2011 Tycoon	CS-Cart	P
232	2011 Ice Queen	CS-Cart	P	R
233	Crystal Lake Warm Weather Sleeping Bag	CS-Cart	P
234	White Water™ Cool Weather Sleeping Bag	CS-Cart	P
235	Everglades Cold Weather Sleeping Bag	CS-Cart	P
236	WeatherMaster Screened 6 Tent With Hinged Door	CS-Cart	P
237	Elite Evanston 8 Tent	CS-Cart	P
238	Apple iPhone 4S Black	CS-Cart	P
239	Apple iPhone 4S White	CS-Cart	P
242	Apple iPod Classic Black	CS-Cart	P
243	Apple iPod Classic White	CS-Cart	P
78	adizero Rush Shoes	CS-Cart	P
79	adiZero Tempaia Shoes	CS-Cart	P
80	Nike Tenkay Slip TXTL Women's Shoe	CS-Cart	P
81	Minnetonka Original Cowhide Driving Moc	CS-Cart	P
82	Legend of the Guardians: the Owls of Ga'hoole(VG)	CS-Cart	P
83	Speed Racer: The Videogame (Wii)	CS-Cart	P
84	Lego Batman (Wii)	CS-Cart	P
85	Looney Tunes: Acme Arsenal (Wii)	CS-Cart	P
86	Nokia 700	CS-Cart	P
87	Sesame Street:Cookie's Counting Carnival (Wii)	CS-Cart	P
88	Lord of the Rings: War in the North(PS3)	CS-Cart	P
89	Green Lantern: Rise of the Manhunters (PS3)	CS-Cart	P
90	F.E.A.R. 3 (PS3) MX	CS-Cart	P
91	Montblanc Nicolas Rieussec Chronograph Automatic	CS-Cart	P
92	Montblanc TimeWalker Automatic	CS-Cart	P
93	Scene It? Bright Lights! Big Screen(X360)	CS-Cart	P
94	Batman: Arkham City (X360)	CS-Cart	P
95	Game Party: In Motion (X360)	CS-Cart	P
96	Batman: Arkham City (X360) CE	CS-Cart	P
97	Harry Potter and the Deathly Hallows - Part 2 (Blu-ray+DVD+UltraViolet Digital Copy Combo Pack)	CS-Cart	P
100	The Hangover Part II (Blu-ray)	CS-Cart	P
101	Nokia X3-02	CS-Cart	P
102	PR 100 Women's White Quartz Watch	CS-Cart	P
103	Fringe: The Complete Third Season (Blu-Ray)	CS-Cart	P
104	Final Destination 5 (Blu-ray)	CS-Cart	P
105	Nokia Lumia 800	CS-Cart	P
106	Nokia E5-00	CS-Cart	P
107	Montblanc Classic Collection Money Clip	CS-Cart	P
108	Due Date (Blu-ray)	CS-Cart	P
109	Montblanc Contemporary Collection Key Ring with Montblanc emblem	CS-Cart	P
110	Roots 30th Anniversary Special Edition (DVD)	CS-Cart	P
111	Last Samurai, The (DVD) (WS)	CS-Cart	P
112	Gone with The Wind: 2-Disc Special Edition	CS-Cart	P
113	SGH-I677	CS-Cart	P
114	Birds of Prey: The Complete Series (DVD)	CS-Cart	P