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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 (
    3797, 3798, 3799, 3800, 3801, 3802, 3803, 
    3804, 3805, 3806, 3807, 3808, 3809, 
    3810, 3811, 3812, 3813, 3814, 3815, 
    3816, 3817, 3818, 3819, 3820, 3821, 
    3822, 3823, 3824, 3825, 3826, 3827, 
    3828, 3829, 3830, 3831, 3832, 3778, 
    2103, 2104, 2105, 2106, 2107, 2108, 
    2109, 2110, 2111, 2112, 2113
  ) 
  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 0.00037

JSON explain

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