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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 (
    137, 138, 139, 240, 241, 242, 293, 294, 
    295, 296, 3520, 3521, 3522, 3523, 3524, 
    3936, 3937, 3938, 3983, 3984, 4042, 
    4043, 4044, 4124
  ) 
  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"
  }
}