SELECT 
  video_id, 
  product_id 
FROM 
  q_ab__video_gallery 
WHERE 
  product_id IN (
    50214, 50215, 50216, 45840, 50264, 50265, 
    50266
  )

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "3.81"
    },
    "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": 7,
      "rows_produced_per_join": 7,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "2.41",
        "eval_cost": "1.40",
        "prefix_cost": "3.81",
        "data_read_per_join": "504"
      },
      "used_columns": [
        "video_id",
        "product_id"
      ],
      "attached_condition": "(`portal`.`q_ab__video_gallery`.`product_id` in (50214,50215,50216,45840,50264,50265,50266))"
    }
  }
}