QUERY PLAN
Limit (cost=0.42..1970.49 rows=1 width=28)
-> Index Scan Backward using tbl_client_am_change_logs_pkey on tbl_client_am_change_logs (cost=0.42..5910.62 rows=3 width=28)
Filter: ((end_at IS NULL) AND (client_id = 3338) AND (sales_rep = 1004))