SELECT 
  video_id, 
  product_id 
FROM 
  cscart_ab__video_gallery 
WHERE 
  product_id IN (
    2543, 2542, 1744, 2352, 2410, 2541, 2346, 
    2338, 2348, 2349, 2347, 2350
  )

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_ab__video_gallery",
      "access_type": "range",
      "possible_keys": ["product_id"],
      "key": "product_id",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 12,
      "filtered": 100,
      "attached_condition": "cscart_ab__video_gallery.product_id in (2543,2542,1744,2352,2410,2541,2346,2338,2348,2349,2347,2350)",
      "using_index": true
    }
  }
}