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 (
    10997, 11048, 11049, 11059, 11098, 11113, 
    11262, 11283, 11314, 11329, 10041, 
    10241, 10536, 10556, 10969, 10971, 
    10985, 10998, 11001, 11007, 11051, 
    11053, 11056, 11179, 11181, 11192, 
    11243, 11328, 8862, 10184, 10296, 10549, 
    10990, 11010, 11012, 11043, 11052, 
    11054, 11060, 11062
  ) 
  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 0.00137

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "56.01"
    },
    "grouping_operation": {
      "using_filesort": false,
      "table": {
        "table_name": "cscart_product_prices",
        "access_type": "range",
        "possible_keys": [
          "usergroup",
          "product_id",
          "lower_limit",
          "usergroup_id"
        ],
        "key": "usergroup",
        "used_key_parts": [
          "product_id",
          "usergroup_id",
          "lower_limit"
        ],
        "key_length": "9",
        "rows_examined_per_scan": 80,
        "rows_produced_per_join": 80,
        "filtered": "100.00",
        "index_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_prices`.`lower_limit` = 1) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_prices`.`product_id` in (10997,11048,11049,11059,11098,11113,11262,11283,11314,11329,10041,10241,10536,10556,10969,10971,10985,10998,11001,11007,11051,11053,11056,11179,11181,11192,11243,11328,8862,10184,10296,10549,10990,11010,11012,11043,11052,11054,11060,11062)) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_prices`.`usergroup_id` in (0,1)))",
        "cost_info": {
          "read_cost": "48.01",
          "eval_cost": "8.00",
          "prefix_cost": "56.01",
          "data_read_per_join": "1K"
        },
        "used_columns": [
          "product_id",
          "price",
          "percentage_discount",
          "lower_limit",
          "usergroup_id"
        ]
      }
    }
  }
}