SELECT 
  company_descriptions.*, 
  companies.*, 
  cscart_vendor_plan_descriptions.plan, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
FROM 
  cscart_companies AS companies 
  LEFT JOIN cscart_company_descriptions AS company_descriptions ON company_descriptions.company_id = companies.company_id 
  AND company_descriptions.lang_code = 'ru' 
  LEFT JOIN cscart_vendor_plan_descriptions ON companies.plan_id = cscart_vendor_plan_descriptions.plan_id 
  AND cscart_vendor_plan_descriptions.lang_code = 'ru' 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = 588 
  AND cscart_seo_names.type = 'm' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'ru' 
WHERE 
  companies.company_id = 588

Query time 0.00056

JSON explain

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    "nested_loop": [
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          "used_key_parts": [
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          ],
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          "rows_examined_per_scan": 1,
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            "status",
            "company",
            "official",
            "lang_code",
            "street",
            "address",
            "city",
            "state",
            "country",
            "zipcode",
            "email",
            "phone",
            "url",
            "storefront",
            "secure_storefront",
            "entry_page",
            "redirect_customer",
            "countries_list",
            "timestamp",
            "shippings",
            "logos",
            "request_user_id",
            "request_account_name",
            "request_account_data",
            "tax_number",
            "pre_moderation",
            "pre_moderation_edit",
            "pre_moderation_edit_vendors",
            "plan_id",
            "plan_time",
            "plan_start",
            "yandex_checkout_shopid",
            "yandex_checkout_marketplace_fee",
            "yandex_checkout_commission_type",
            "yandex_checkout_agent_type",
            "saved_shippings_state",
            "referral_id",
            "access_reward_points",
            "max_bonus_reward_points",
            "need",
            "min_percent",
            "max_percent",
            "min_day",
            "max_day",
            "prepayment",
            "limit_price",
            "region_id",
            "city_id",
            "company_status_id",
            "check_status_time",
            "general_rating",
            "is_premium",
            "uniquePage",
            "lat",
            "lon",
            "is_available"
          ]
        }
      },
      {
        "table": {
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          },
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            "company_description",
            "terms"
          ]
        }
      },
      {
        "table": {
          "table_name": "cscart_vendor_plan_descriptions",
          "access_type": "const",
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          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "plan_id",
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          "used_columns": [
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            "lang_code",
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          ]
        }
      },
      {
        "table": {
          "table_name": "cscart_seo_names",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "dispatch"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
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            "lang_code"
          ],
          "key_length": "206",
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          ],
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            "data_read_per_join": "1K"
          },
          "used_columns": [
            "name",
            "object_id",
            "type",
            "dispatch",
            "path",
            "lang_code"
          ]
        }
      }
    ]
  }
}