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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 (
    2273, 2274, 2275, 2276, 2340, 2341, 2342, 
    2343, 2344, 2345, 2346, 2347, 2348, 
    2421, 2422, 2423, 2424, 2425, 2426, 
    2427, 2428, 2429, 2430, 2431, 2432, 
    2433, 2434, 2435, 2436, 2437, 2438, 
    2519, 2520, 2521, 2522, 2523, 2524, 
    2525, 2526, 2527, 2608, 2609, 2610, 
    2611, 2612, 2613, 2614, 2615
  ) 
  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"
  }
}