SELECT 
  *, 
  GROUP_CONCAT(
    if (
      cscart_cp_video_category_links.link_type = 'M', 
      CONCAT(
        cscart_cp_video_category_links.category_id, 
        'M'
      ), 
      cscart_cp_video_category_links.category_id
    )
  ) as category_ids, 
  cscart_cp_videos.timestamp as timestamp, 
  cscart_cp_videos.position as position, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
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' 
  INNER JOIN cscart_cp_video_category_links ON cscart_cp_video_category_links.video_id = cscart_cp_videos.video_id 
  INNER JOIN cscart_cp_video_categories ON cscart_cp_video_categories.category_id = cscart_cp_video_category_links.category_id 
  AND cscart_cp_video_categories.company_id = 1 
  AND cscart_cp_video_categories.status IN ('A', 'H') 
  AND cscart_cp_videos.status IN ('A', 'H') 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = cscart_cp_videos.video_id 
  AND cscart_seo_names.type = 'v' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'ru' 
  AND cscart_seo_names.company_id = cscart_cp_videos.company_id 
WHERE 
  1 
  AND cscart_cp_videos.video_id = 6 
  AND cscart_cp_videos.status = 'A'

Query time 0.00115

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_cp_videos",
      "access_type": "const",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["video_id"],
      "ref": ["const"],
      "rows": 1,
      "filtered": 100
    },
    "table": {
      "table_name": "cscart_cp_video_descriptions",
      "access_type": "const",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["video_id", "lang_code"],
      "ref": ["const", "const"],
      "rows": 1,
      "filtered": 100
    },
    "table": {
      "table_name": "cscart_seo_names",
      "access_type": "const",
      "possible_keys": ["PRIMARY", "dispatch"],
      "key": "PRIMARY",
      "key_length": "210",
      "used_key_parts": [
        "object_id",
        "type",
        "dispatch",
        "lang_code",
        "company_id"
      ],
      "ref": ["const", "const", "const", "const", "const"],
      "rows": 1,
      "filtered": 100
    },
    "table": {
      "table_name": "cscart_cp_video_category_links",
      "access_type": "ref",
      "possible_keys": ["PRIMARY", "pt"],
      "key": "pt",
      "key_length": "3",
      "used_key_parts": ["video_id"],
      "ref": ["const"],
      "rows": 1,
      "filtered": 100
    },
    "table": {
      "table_name": "cscart_cp_video_categories",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY", "p_category_id"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["category_id"],
      "ref": [
        "orbit_cscart_orbit_cscart.cscart_cp_video_category_links.category_id"
      ],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "cscart_cp_video_categories.company_id = 1 and cscart_cp_video_categories.`status` in ('A','H')"
    }
  }
}