SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  descr1.product as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id, 
  descr1.full_description as full_description 
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) 
WHERE 
  1 
  AND cscart_categories.category_id IN (
    166, 174, 175, 176, 177, 178, 179, 180, 
    181, 182, 199, 185, 186, 187, 188, 189, 
    190, 191, 194, 193, 195, 196, 197, 198, 
    200, 202, 234, 235, 236, 237, 238, 240, 
    254, 255, 263
  ) 
  AND companies.status IN ('A') 
  AND products.company_id = 1 
  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.company_id = 1 
  AND products.parent_product_id = 0 
  AND products.company_id IN('1', '2', '3', '4', '5', '6') 
  AND products.product_type != 'D' 
GROUP BY 
  products.product_id 
ORDER BY 
  product asc, 
  products.product_id ASC 
LIMIT 
  60, 12

Query time 0.00360

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "29.01"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "companies",
              "access_type": "const",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "const"
              ],
              "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": "7K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "ALL",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "rows_examined_per_scan": 86,
              "rows_produced_per_join": 1,
              "filtered": "1.63",
              "cost_info": {
                "read_cost": "20.36",
                "eval_cost": "0.28",
                "prefix_cost": "20.64",
                "data_read_per_join": "3K"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "((`atulecarter_atul_demo1`.`cscart_categories`.`category_id` in (166,174,175,176,177,178,179,180,181,182,199,185,186,187,188,189,190,191,194,193,195,196,197,198,200,202,234,235,236,237,238,240,254,255,263)) and ((`atulecarter_atul_demo1`.`cscart_categories`.`usergroup_ids` = '') or find_in_set(0,`atulecarter_atul_demo1`.`cscart_categories`.`usergroup_ids`) or find_in_set(1,`atulecarter_atul_demo1`.`cscart_categories`.`usergroup_ids`)) and (`atulecarter_atul_demo1`.`cscart_categories`.`status` in ('A','H')) and (`atulecarter_atul_demo1`.`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_demo1.cscart_categories.category_id"
              ],
              "rows_examined_per_scan": 3,
              "rows_produced_per_join": 4,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "1.48",
                "eval_cost": "0.84",
                "prefix_cost": "22.95",
                "data_read_per_join": "67"
              },
              "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_demo1.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "8.52",
              "cost_info": {
                "read_cost": "4.20",
                "eval_cost": "0.07",
                "prefix_cost": "27.99",
                "data_read_per_join": "1K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "usergroup_ids",
                "parent_product_id"
              ],
              "attached_condition": "((`atulecarter_atul_demo1`.`products`.`parent_product_id` = 0) and (`atulecarter_atul_demo1`.`products`.`company_id` = 1) and ((`atulecarter_atul_demo1`.`products`.`usergroup_ids` = '') or find_in_set(0,`atulecarter_atul_demo1`.`products`.`usergroup_ids`) or find_in_set(1,`atulecarter_atul_demo1`.`products`.`usergroup_ids`)) and (`atulecarter_atul_demo1`.`products`.`status` = 'A') and (`atulecarter_atul_demo1`.`products`.`product_type` <> 'D'))"
            }
          },
          {
            "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_demo1.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.36",
                "eval_cost": "0.07",
                "prefix_cost": "28.42",
                "data_read_per_join": "1K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product",
                "full_description"
              ]
            }
          },
          {
            "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_demo1.products_categories.product_id"
              ],
              "rows_examined_per_scan": 3,
              "rows_produced_per_join": 1,
              "filtered": "97.36",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.38",
                "eval_cost": "0.21",
                "prefix_cost": "29.02",
                "data_read_per_join": "25"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`atulecarter_atul_demo1`.`prices`.`lower_limit` = 1) and (`atulecarter_atul_demo1`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          }
        ]
      }
    }
  }
}

Result

product_id product company_name product_type parent_product_id full_description
163 NX200 20.3 Megapixel Compact System Camera CS-Cart P 0 <p>Capture every moment in true-to-life quality. With the best-in-class resolution of the extra large 20.3 MP APS-C CMOS sensor, shots are rich, deep and exquisitely detailed. For active subjects, stills can be captured beautifully with 7fps Continuous Shot/100ms AF Speed. Then review your shot on the large 3.0&rdquo; AMOLED display&mdash;made for sharper images and glare reduction.</p>
155 Porta Pro KTC On-Ear Headphone CS-Cart P 0 <p>Koss Porta Pro KTC, the most sophisticated version of the Porta Pro, features a new technological upgrade which brings listeners closer to the music they love. Koss Touch Control (KTC) remote and microphone technology, made for iPhone&reg;, iPad&reg; and iPod&reg;, gives listeners more control in fewer steps. Listeners are now able to stay connected, shuffle song and adjust volume with the flick of a switch.</p>
55 PRS-D800 CS-Cart P 0 <p>The PRS-D800 2-channel amplifier contains audiophile grade components that were carefully selected and design perfected to achieve highest audio quality.</p>
69 Rhyme CS-Cart P 0 <p>HTC Rhyme&trade; and its suite of innovative accessories<br /> deliver seamless experiences.<br /><br />Docking Station<br />Effortlessly slide the HTC Rhyme into the Docking Station to charge it and automatically activate Dock Mode, turning your phone into an all-in-one alarm clock, music player, and picture frame.<br /><br /> Charm<br /> Attached to your bag, the Charm alerts you of calls, missed calls, and messages. It also keeps your phone within easy reach and goes with anything.<br /><br /> Tangle&ndash;free Headphones<br /> These headphones don&rsquo;t just sound amazing&mdash;they&rsquo;re virtually tangle-free, thanks to flat wires.<br /><br />Exclusive HTC Sense&trade; experience<br /> The HTC Rhyme delivers a visually refined and intuitive <br /> HTC Sense experience. Find what you want faster with streamlined menus across HTC Sense apps and get the live info you care about on the home screen with the Quick Launch widget. Stay on top of all your to-dos by creating tasks from emails and messages, then sync those tasks with your Microsoft&reg; Exchange account for one to-do list on phone and PC.</p>
184 Samsung 30mm NX Pancake Lens CS-Cart P 0 <p>Samsung&rsquo;s compact 30mm pancake lens is the brightest in its class. With its 30mm fixed focal length and maximum aperture of F/2, you can capture exceptionally bright images &mdash; even in low-light situations such as shady forest paths and indoor weddings. You can also create striking, images with shallow depth of field in a variety of settings. And since it&rsquo;s incredibly slim and lightweight, you can take it with you everywhere.</p>
183 Samsung 50-200mm NX Telephoto OIS Lens CS-Cart P 0 <p>The Samsung T50200SB 50-200mm Telephoto OIS Lens is a long telephoto zoom lens compatible with our NX Series of digital cameras.</p>
133 Samsung Galaxy Player 4.0 CS-Cart P 0 <p>Easily connect via Wi-Fi without any monthly service fees. The Samsung Galaxy Player can access the internet and apps anywhere there is an available hotspot. The sleek, lightweight 4.27 oz. design fits in any pocket and the brilliant 4&rdquo; Super Clear LCD delivers incredible viewing quality.</p>
132 Samsung Galaxy Player 5.0 CS-Cart P 0 <p>Easily connect via Wi-Fi without any monthly service fees. The Samsung Galaxy Player can access the internet and apps anywhere there is an available hotspot. The sleek, lightweight 6.42 oz. design fits in any pocket and the brilliant 5&rdquo; LCD delivers incredible viewing quality.</p>
125 Samsung Galaxy S II CS-Cart P 0 <dl><dt>The Galaxy S II has an amazing 4.27" Super AMOLED Plus screen. This superb display has razor sharp clarity and breathtaking color. See every detail of videos and pictures. See the full range of hues in all their subtlety and brilliance. And with its superior wide viewing angle, you don't have to be directly in front of the screen to see a perfect image. Truth is, you really have to see it to believe it.</dt></dl>
120 Samsung Galaxy S II, Epic 4G Touch (Black) CS-Cart P 0 <p>The fastest, state-of-the-art networks are 4G, so naturally, the Epic&trade; 4G Touch is designed for speed. With 4G, every download, upload, app, game, connection and feature runs almost as fast as you can push the button.</p>
146 Sansa Clip+ MP3 Player (Blue) - 4GB CS-Cart P 0 <p>Small but powerful, the Sansa Clip+ is a tiny MP3 player that boasts an array of cool features, as well as distinctively big sound for its small size. Rock out with up to 1,000 songs on this blue player. &dagger; Enjoy even more play when you use the expandable memory slot to play preloaded microSDHC&trade; cards**. slotRadio&trade; and slotMusic cards** are preloaded with tunes ready to pop into the player&rsquo;s memory card slot. Rock on with a 15-hour battery life. &dagger; &dagger;</p>
147 Sansa Clip+ MP3 Player (Red) - 4GB CS-Cart P 0 <p>Small but powerful, the Sansa Clip+ is a tiny MP3 player that boasts an array of cool features, as well as distinctively big sound for its small size. Rock out with up to 1,000 songs on this red player. Enjoy even more play when you use the expandable memory slot to play preloaded microSDHC cards. slotRadio and slotMusic cards are preloaded with tunes ready to pop into the player&rsquo;s memory card slot. Rock on with a 15-hour battery life.</p>