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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 (
    6619, 6620, 6621, 6622, 2272, 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, 2616, 5872, 
    5873, 5874, 5875, 5940, 5941, 5942, 
    5943, 5944, 5945, 5946, 5947, 5948, 
    6021, 6022, 6023, 6024, 6025, 6026, 
    6027, 6028, 6029, 6030, 6031, 6032, 
    6033, 6034, 6035, 6036, 6037, 6038, 
    6111, 6112, 6113, 6114, 6115, 6116, 
    6117, 6118, 6119, 6201, 6202
  ) 
  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 0.00034

JSON explain

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