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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 (
    3525, 3526, 3527, 3528, 3529, 3530, 3531, 
    3940, 3941, 3942, 3943, 3944, 3945, 
    3946, 3985, 3986, 3987, 3988, 3989, 
    3990, 3991, 4045, 4046, 4047, 4048, 
    4049, 4050, 4051, 4128, 4129, 4130, 
    4131, 4132, 4133, 4134, 4181, 4182, 
    4183, 4184, 4185, 4186, 4187, 26, 27, 
    28, 72, 73, 74
  ) 
  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 0.00038

JSON explain

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