SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    7004, 7003, 8140, 8093, 6664, 10201, 
    7010, 9806, 7007, 8144, 7075, 7006, 
    7540, 10286
  )

Query time 0.00089

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 14,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (7004,7003,8140,8093,6664,10201,7010,9806,7007,8144,7075,7006,7540,10286)"
        }
      }
    ]
  }
}