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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 (
    1818, 1819, 3744, 3745, 3746, 3747, 5461, 
    5462, 5463, 5464, 5465, 5466, 5467, 
    5468, 5469, 5470, 5471, 5472, 5473, 
    5474, 5475, 5476, 5477, 5478
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00031

JSON explain

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