{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "7.21"
},
"table": {
"table_name": "cscart_product_review_prepared_data",
"access_type": "range",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"product_id",
"storefront_id"
],
"key_length": "7",
"rows_examined_per_scan": 3,
"rows_produced_per_join": 3,
"filtered": "100.00",
"index_condition": "((`webmarco`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`webmarco`.`cscart_product_review_prepared_data`.`product_id` in (286355,286356,286357)))",
"cost_info": {
"read_cost": "6.61",
"eval_cost": "0.60",
"prefix_cost": "7.21",
"data_read_per_join": "48"
},
"used_columns": [
"product_id",
"storefront_id",
"average_rating",
"reviews_count"
]
}
}
}