QUERY PLAN
Seq Scan on tbl_browser_ua_statistics b (cost=0.00..7.58 rows=1 width=148)
Filter: (user_agent = 'Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Mobile/15A372 Safari/604.1'::text)