SELECT 
  cscart_ab__video_gallery_descriptions.video_path, 
  videos.video_id, 
  videos.product_id, 
  videos.status, 
  videos.pos, 
  videos.type, 
  videos.settings, 
  videos.icon_type, 
  cscart_ab__video_gallery_descriptions.title, 
  cscart_ab__video_gallery_descriptions.description 
FROM 
  cscart_ab__video_gallery AS videos 
  LEFT JOIN cscart_ab__video_gallery_descriptions ON cscart_ab__video_gallery_descriptions.video_id = videos.video_id 
  AND cscart_ab__video_gallery_descriptions.lang_code = 'ru' 
WHERE 
  1 
  AND videos.type NOT IN ('H', 'R') 
  AND videos.status = 'A' 
  AND videos.product_id = 6751 
ORDER BY 
  videos.pos ASC

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "videos.pos",
        "table": {
          "table_name": "videos",
          "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": "videos.`status` = 'A'",
          "attached_condition": "videos.`status` <=> 'A' and videos.product_id = 6751 and videos.`type` not in ('H','R')"
        }
      }
    },
    "table": {
      "table_name": "cscart_ab__video_gallery_descriptions",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["video_id", "lang_code"],
      "ref": ["admin_test.videos.video_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(cscart_ab__video_gallery_descriptions.lang_code = 'ru')"
    }
  }
}