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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 (
    3857, 3858, 3859, 3860, 2715, 2716, 2717, 
    2718, 2719, 6303, 6304, 6305, 6306, 
    1500, 1501, 1502, 1503, 3726, 5206, 
    5207, 5208, 5209, 6736, 1490, 1491, 
    1492, 1493, 3724, 5198, 5199, 5200, 
    5201, 6735, 1495, 1496, 1497, 1498, 
    3164, 3725, 5202, 5203, 5204, 5205, 
    1485, 1486, 1487, 1488, 3163
  ) 
  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 0.00027

JSON explain

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