QUERY PLAN
Limit (cost=790.89..889.70 rows=20 width=957)
-> Index Scan Backward using tbl_api_log_pkey on tbl_api_log a (cost=0.42..35942.08 rows=7275 width=957)
Filter: ((device_type = '6'::smallint) AND ((schema)::text = 'a57be577deb434'::text))