SELECT 
  *, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
FROM 
  cscart_categories 
  LEFT JOIN cscart_category_descriptions ON cscart_category_descriptions.category_id = cscart_categories.category_id 
  AND cscart_category_descriptions.lang_code = 'en' 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = 315 
  AND cscart_seo_names.type = 'c' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'en' 
WHERE 
  cscart_categories.category_id = 315 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  )

Query time 0.00065

JSON explain

{
  "query_block": {
    "select_id": 1,
    "const_condition": "1",
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_categories",
          "access_type": "const",
          "possible_keys": ["PRIMARY", "c_status", "p_category_id"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["category_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "cscart_category_descriptions",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["category_id", "lang_code"],
          "ref": ["const", "const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "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": ["const", "const", "const", "const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "trigcond(cscart_seo_names.`type` = 'c' and cscart_seo_names.dispatch = '' and cscart_seo_names.lang_code = 'en')"
        }
      }
    ]
  }
}

Result

category_id parent_id id_path level company_id usergroup_ids status product_count position timestamp is_op localization age_verification age_limit parent_age_verification parent_age_limit selected_views default_view product_details_view product_columns is_trash is_default category_type is_pre_owned like_count storefront_id enable_offer enable_subcat_offer enable_offer_cg_products lang_code category description meta_keywords meta_description page_title age_warning_message name object_id type dispatch path seo_name seo_path
315 318 266/318/315 3 0 0 A 0 40 1631422800 N N 0 N 0 default 0 N N C 0 0 1 N N N en Pre-owned Skirts <p>Discover our pre-owned skirts, perfect for any occasion. From vintage midi skirts to chic minis, each piece has its own charm. By choosing these skirts, you're supporting sustainable fashion and extending the life of garments. At Fundamentally, we lovingly select each skirt for you. Find your match and look fabulous with a conscious style!</p> pre-owned-skirts 315 c 266/318 pre-owned-skirts 266/318