SELECT 
  video_id, 
  product_id 
FROM 
  cscart_ab__video_gallery 
WHERE 
  product_id IN (
    21037, 21038, 21039, 21040, 21041, 21042, 
    21043, 21044, 21045, 21046, 21047, 
    21048, 21049, 21050, 21051, 21052
  ) 
  AND status = "A"

Query time 0.00016

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 (21037,21038,21039,21040,21041,21042,21043,21044,21045,21046,21047,21048,21049,21050,21051,21052)"
    }
  }
}