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SELECT 
  cscart_product_review_prepared_data.product_id AS product_id, 
  cscart_product_review_prepared_data.average_rating AS average_rating, 
  cscart_product_review_prepared_data.reviews_count AS reviews_count 
FROM 
  cscart_product_review_prepared_data 
WHERE 
  cscart_product_review_prepared_data.product_id IN (
    2766, 2767, 2768, 6352, 6353, 6354, 6355, 
    6356, 2185, 2186, 2187, 2188, 5785, 
    5786, 5787, 5788, 5789, 6641, 6219, 
    5807, 3722, 5819, 1516, 6623
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "Impossible WHERE noticed after reading const tables"
  }
}