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 (
    278, 280, 282, 247, 248, 241, 244, 246, 
    240, 6, 66, 166, 214, 219, 221, 223, 192, 
    194, 195, 196, 197, 198, 199, 200, 201, 
    202, 203, 204, 205, 206, 207, 208, 209, 
    210, 211, 212, 213, 215, 217, 218, 220, 
    222, 224, 225, 226, 227, 228, 229, 230, 
    231, 232, 233, 234, 235, 236, 237, 238, 
    239, 242, 243, 78, 79, 80, 81
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "12.56"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 52,
      "rows_produced_per_join": 52,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "2.17",
        "eval_cost": "10.40",
        "prefix_cost": "12.57",
        "data_read_per_join": "832"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`pankajecarter_setup1`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`pankajecarter_setup1`.`cscart_product_review_prepared_data`.`product_id` in (278,280,282,247,248,241,244,246,240,6,66,166,214,219,221,223,192,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,215,217,218,220,222,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,242,243,78,79,80,81)))"
    }
  }
}