SELECT 
  product_id 
FROM 
  cscart_product_popularity 
WHERE 
  product_id IN (
    15230, 15229, 47523, 6353, 47525, 47526, 
    47527
  )

Query time 0.00088

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_popularity",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "total"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 7,
          "filtered": 100,
          "attached_condition": "cscart_product_popularity.product_id in (15230,15229,47523,6353,47525,47526,47527)",
          "using_index": true
        }
      }
    ]
  }
}

Result

product_id
6353
15229
15230
47523
47525
47526
47527