explain-analyze.info | query-plan-1192

Summary

Time		Node
Node (ms)	Percent	Node
0.759	100.00%	¶	`Index Scan using events_pkey on events (cost=0.0..236.39 rows=104 width=4) (actual time=0.014..0.759 rows=540 loops=1) Index Cond: (event_id >= 17510250) Filter: ("type" = 500000)`

Highlighted rows indicate a disparity between the number of rows estimated and actually returned. You may want to run ANALYZE to update the server's statistics.
For more information on using EXPLAIN and interpreting its output, see the Postgres documentation, in particular the EXPLAIN and ANALYZE references pages, and Using Explain.