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 (
    19932, 14056, 18508, 18520, 18571, 14112, 
    14092, 14080, 14066, 14050, 14049, 
    19603, 14091, 14123, 14079, 14090, 
    14122, 14089, 19711, 19947, 14065, 
    14102, 14064, 14063
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0175378,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_review_prepared_data",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "loops": 1,
          "rows": 41,
          "cost": 0.0175378,
          "filtered": 58.53658676,
          "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (19932,14056,18508,18520,18571,14112,14092,14080,14066,14050,14049,19603,14091,14123,14079,14090,14122,14089,19711,19947,14065,14102,14064,14063)"
        }
      }
    ]
  }
}

Result

product_id average_rating reviews_count
18508 3.00 1