SELECT 
  cscart_pages.*, 
  cscart_page_descriptions.page, 
  cscart_tag_links.*, 
  cscart_tags.tag, 
  cscart_tags.tag_id, 
  cscart_tags.timestamp, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
FROM 
  cscart_pages 
  LEFT JOIN cscart_page_descriptions ON cscart_pages.page_id = cscart_page_descriptions.page_id 
  AND cscart_page_descriptions.lang_code = 'en' 
  INNER JOIN cscart_tag_links ON cscart_pages.page_id = cscart_tag_links.object_id 
  AND cscart_tag_links.object_type = 'A' 
  INNER JOIN cscart_tags ON cscart_tag_links.tag_id = cscart_tags.tag_id 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = cscart_pages.page_id 
  AND cscart_seo_names.type = 'a' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'en' 
WHERE 
  1 
  AND cscart_pages.status IN ('A') 
  AND cscart_pages.company_id IN (0, 2, 64, 92, 103, 104, 121, 127) 
  AND cscart_pages.page_type IN ('T', 'L', 'B', 'F', 'P') 
  AND (
    cscart_pages.usergroup_ids = '' 
    OR FIND_IN_SET(0, cscart_pages.usergroup_ids) 
    OR FIND_IN_SET(1, cscart_pages.usergroup_ids)
  ) 
  AND (
    cscart_pages.use_avail_period = 'N' 
    OR (
      cscart_pages.use_avail_period = 'Y' 
      AND cscart_pages.avail_from_timestamp <= 1786460455 
      AND (
        cscart_pages.avail_till_timestamp >= 1786460455 
        OR cscart_pages.avail_till_timestamp = 0
      )
    )
  ) 
  AND (
    cscart_tags.tag = 'spracovanie osobnych udajov'
  ) 
  AND cscart_tags.status = 'A' 
ORDER BY 
  cscart_pages.position asc, 
  cscart_page_descriptions.page asc

Query time 0.00059

JSON explain

{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "cscart_pages.position, cscart_page_descriptions.`page`",
      "temporary_table": {
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_tags",
              "access_type": "ref",
              "possible_keys": ["PRIMARY", "tag"],
              "key": "tag",
              "key_length": "767",
              "used_key_parts": ["tag"],
              "ref": ["const"],
              "rows": 1,
              "filtered": 100,
              "index_condition": "cscart_tags.tag = 'spracovanie osobnych udajov'",
              "attached_condition": "cscart_tags.`status` = 'A'"
            }
          },
          {
            "table": {
              "table_name": "cscart_tag_links",
              "access_type": "ref",
              "possible_keys": ["PRIMARY", "tag_id", "ids"],
              "key": "ids",
              "key_length": "6",
              "used_key_parts": ["tag_id", "object_type"],
              "ref": ["ebonza_cscart_test.cscart_tags.tag_id", "const"],
              "rows": 1,
              "filtered": 100,
              "attached_condition": "cscart_tag_links.object_type = 'A'",
              "using_index": true
            }
          },
          {
            "table": {
              "table_name": "cscart_pages",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "3",
              "used_key_parts": ["page_id"],
              "ref": ["ebonza_cscart_test.cscart_tag_links.object_id"],
              "rows": 1,
              "filtered": 100,
              "attached_condition": "cscart_pages.`status` = 'A' and cscart_pages.company_id in (0,2,64,92,103,104,121,127) and cscart_pages.page_type in ('T','L','B','F','P') and (cscart_pages.usergroup_ids = '' or find_in_set(0,cscart_pages.usergroup_ids) or find_in_set(1,cscart_pages.usergroup_ids)) and (cscart_pages.use_avail_period = 'N' or cscart_pages.use_avail_period = 'Y' and cscart_pages.avail_from_timestamp <= 1786460455 and (cscart_pages.avail_till_timestamp >= 1786460455 or cscart_pages.avail_till_timestamp = 0))"
            }
          },
          {
            "table": {
              "table_name": "cscart_page_descriptions",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "9",
              "used_key_parts": ["page_id", "lang_code"],
              "ref": ["ebonza_cscart_test.cscart_tag_links.object_id", "const"],
              "rows": 1,
              "filtered": 100,
              "attached_condition": "trigcond(cscart_page_descriptions.lang_code = 'en')"
            }
          },
          {
            "table": {
              "table_name": "cscart_seo_names",
              "access_type": "ref",
              "possible_keys": ["PRIMARY", "dispatch"],
              "key": "PRIMARY",
              "key_length": "206",
              "used_key_parts": ["object_id", "type", "dispatch", "lang_code"],
              "ref": [
                "ebonza_cscart_test.cscart_tag_links.object_id",
                "const",
                "const",
                "const"
              ],
              "rows": 16,
              "filtered": 100,
              "attached_condition": "trigcond(cscart_seo_names.`type` = 'a' and cscart_seo_names.dispatch = '' and cscart_seo_names.lang_code = 'en')"
            }
          }
        ]
      }
    }
  }
}