SELECT 
  cscart_ult_product_prices.product_id, 
  MIN(
    IF(
      cscart_ult_product_prices.percentage_discount = 0, 
      cscart_ult_product_prices.price, 
      cscart_ult_product_prices.price - (
        cscart_ult_product_prices.price * cscart_ult_product_prices.percentage_discount
      )/ 100
    )
  ) AS price 
FROM 
  cscart_ult_product_prices 
WHERE 
  cscart_ult_product_prices.product_id IN (
    6002, 6105, 6106, 6107, 6108, 1653, 2224, 
    1599, 1572, 2603, 6191, 2509, 1626, 
    2281, 2282, 2283, 2284, 2285, 2331, 
    2332, 2333, 2334, 2335, 2403, 2404, 
    2405, 2406, 2407, 2408, 2409, 2410, 
    2411, 2599, 2600, 2601, 2602, 5881, 
    5882, 5883, 5884, 5931, 5932, 5933, 
    5934, 6003, 6004, 6005, 6006
  ) 
  AND cscart_ult_product_prices.lower_limit = 1 
  AND cscart_ult_product_prices.company_id = 1 
  AND cscart_ult_product_prices.usergroup_id IN (0, 0, 1) 
GROUP BY 
  cscart_ult_product_prices.product_id

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}