SELECT 
  video_id, 
  product_id 
FROM 
  cscart_ab__video_gallery 
WHERE 
  product_id IN (
    21149, 21150, 21151, 21152, 21153, 21154, 
    21155, 21156, 21157, 21158, 21159, 
    21160, 21161, 21162, 21163, 21164
  ) 
  AND status = "A"

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_ab__video_gallery",
      "access_type": "ref",
      "possible_keys": ["status", "product_id"],
      "key": "status",
      "key_length": "3",
      "used_key_parts": ["status"],
      "ref": ["const"],
      "rows": 1,
      "filtered": 100,
      "index_condition": "cscart_ab__video_gallery.`status` = 'A'",
      "attached_condition": "cscart_ab__video_gallery.product_id in (21149,21150,21151,21152,21153,21154,21155,21156,21157,21158,21159,21160,21161,21162,21163,21164)"
    }
  }
}