SELECT 
  video_id, 
  product_id 
FROM 
  cscart_ab__video_gallery 
WHERE 
  product_id IN (
    2171, 2167, 2165, 2178, 2173, 2175, 2169, 
    2166, 2168
  )

Query time 0.00040

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": 9,
      "filtered": 100,
      "attached_condition": "cscart_ab__video_gallery.product_id in (2171,2167,2165,2178,2173,2175,2169,2166,2168)",
      "using_index": true
    }
  }
}