SELECT 
  cscart_company_descriptions.*, 
  cscart_companies.*, 
  p.price, 
  p.periodicity, 
  p.commission, 
  p.products_limit, 
  p.revenue_limit, 
  p.vendor_store, 
  p.categories, 
  p.storefronts 
FROM 
  cscart_companies 
  LEFT JOIN cscart_company_descriptions ON cscart_company_descriptions.company_id = cscart_companies.company_id 
  AND cscart_company_descriptions.lang_code = 'ru' 
  LEFT JOIN cscart_vendor_plans p ON p.plan_id = cscart_companies.plan_id 
WHERE 
  cscart_companies.company_id IN('692') 
ORDER BY 
  cscart_companies.company_id asc 
LIMIT 
  0, 1

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "ordering_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_companies",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "company_id"
            ],
            "key_length": "4",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "7K"
            },
            "used_columns": [
              "company_id",
              "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": {
            "table_name": "cscart_company_descriptions",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "company_id",
              "lang_code"
            ],
            "key_length": "10",
            "ref": [
              "const",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "40"
            },
            "used_columns": [
              "company_id",
              "lang_code",
              "company_description",
              "terms"
            ]
          }
        },
        {
          "table": {
            "table_name": "p",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "plan_id"
            ],
            "key_length": "4",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "872"
            },
            "used_columns": [
              "plan_id",
              "price",
              "periodicity",
              "commission",
              "products_limit",
              "revenue_limit",
              "vendor_store",
              "categories",
              "storefronts"
            ]
          }
        }
      ]
    }
  }
}