SELECT 
  video_id, 
  product_id 
FROM 
  q_ab__video_gallery 
WHERE 
  product_id IN (
    8239, 8238, 8237, 8236, 8235, 8234, 8233, 
    7817, 7818, 7819, 7820, 7821, 7822, 
    7823, 7824, 7825
  )

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "7.42"
    },
    "table": {
      "table_name": "q_ab__video_gallery",
      "access_type": "range",
      "possible_keys": [
        "product_id"
      ],
      "key": "product_id",
      "used_key_parts": [
        "product_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 16,
      "rows_produced_per_join": 16,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "4.22",
        "eval_cost": "3.20",
        "prefix_cost": "7.42",
        "data_read_per_join": "1K"
      },
      "used_columns": [
        "video_id",
        "product_id"
      ],
      "attached_condition": "(`portal`.`q_ab__video_gallery`.`product_id` in (8239,8238,8237,8236,8235,8234,8233,7817,7818,7819,7820,7821,7822,7823,7824,7825))"
    }
  }
}