SELECT 
  SQL_CALC_FOUND_ROWS * 
FROM 
  cscart_cp_videos 
  LEFT JOIN cscart_cp_video_descriptions ON cscart_cp_videos.video_id = cscart_cp_video_descriptions.video_id 
  AND cscart_cp_video_descriptions.lang_code = 'ru' 
WHERE 
  1 
  AND cscart_cp_videos.company_id = 1 
  AND cscart_cp_videos.status = 'A' 
ORDER BY 
  cscart_cp_videos.timestamp desc 
LIMIT 
  0, 10

Query time 0.00120

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cscart_cp_videos.`timestamp` desc",
        "table": {
          "table_name": "cscart_cp_videos",
          "access_type": "ALL",
          "rows": 50,
          "filtered": 100,
          "attached_condition": "cscart_cp_videos.company_id = 1 and cscart_cp_videos.`status` = 'A'"
        }
      }
    },
    "table": {
      "table_name": "cscart_cp_video_descriptions",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["video_id", "lang_code"],
      "ref": ["orbit_cscart_orbit_cscart.cscart_cp_videos.video_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(cscart_cp_video_descriptions.lang_code = 'ru')"
    }
  }
}