SELECT 
  cscart_product_prices.product_id, 
  MIN(
    IF(
      cscart_product_prices.percentage_discount = 0, 
      cscart_product_prices.price, 
      cscart_product_prices.price - (
        cscart_product_prices.price * cscart_product_prices.percentage_discount
      )/ 100
    )
  ) AS price 
FROM 
  cscart_product_prices 
WHERE 
  cscart_product_prices.product_id IN (
    197, 198, 199, 200, 201, 202, 203, 204, 
    205, 206, 207, 208, 209, 210, 211, 212, 
    213, 215, 217, 218, 220, 222, 224, 225
  ) 
  AND cscart_product_prices.lower_limit = 1 
  AND cscart_product_prices.usergroup_id IN (0, 1) 
GROUP BY 
  cscart_product_prices.product_id

Query time 0.00086

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "102.59"
    },
    "grouping_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "48.00"
      },
      "table": {
        "table_name": "cscart_product_prices",
        "access_type": "ALL",
        "possible_keys": [
          "usergroup",
          "product_id",
          "lower_limit",
          "usergroup_id"
        ],
        "rows_examined_per_scan": 257,
        "rows_produced_per_join": 47,
        "filtered": "18.68",
        "cost_info": {
          "read_cost": "44.99",
          "eval_cost": "9.60",
          "prefix_cost": "54.59",
          "data_read_per_join": "1K"
        },
        "used_columns": [
          "product_id",
          "price",
          "percentage_discount",
          "lower_limit",
          "usergroup_id"
        ],
        "attached_condition": "((`atulecarter_atul_demo3`.`cscart_product_prices`.`lower_limit` = 1) and (`atulecarter_atul_demo3`.`cscart_product_prices`.`product_id` in (197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,215,217,218,220,222,224,225)) and (`atulecarter_atul_demo3`.`cscart_product_prices`.`usergroup_id` in (0,1)))"
      }
    }
  }
}