PostgreSQL: SELECT WHERE less than 15 minutes old

Question

From the events table below, how do I select events created less than 15 minutes ago?

CREATE TABLE events (
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
);

Answer 1

SELECT created_at FROM events WHERE created_at > NOW() - INTERVAL '15 minutes';

Answer 2

SELECT * FROM events WHERE age(now(), created_at) < '15 minutes';