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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 (
    5102, 5103, 5104, 5105, 5106, 2760, 2761, 
    2762, 2763, 2764, 6348, 6349, 6350, 
    6351, 2756, 2757, 2758, 2759, 6343, 
    6344, 6345, 6346, 6347, 2818, 2819, 
    2820, 2821, 2822, 6404, 6405, 6406, 
    6407, 2933, 2934, 2935, 2936, 6517, 
    6518, 6519, 6520, 6521, 2510, 2511, 
    2512, 2513, 3837, 3838, 3839
  ) 
  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 0.00035

JSON explain

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