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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 (
    6194, 6195, 2595, 2596, 2597, 2598, 6187, 
    6188, 6189, 6190, 2730, 2731, 2732, 
    2733, 2734, 6318, 6319, 6320, 6321, 
    2726, 2727, 2728, 2729, 6313
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00055

JSON explain

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