How do I query to get an ongoing range of dates

[CGRRay]

I want to select records that have an expiration date of 1 month before the current date on.
The query looks something like this:
SELECT first_name, last_name
FROM members
WHERE exp_date >

The exp_date is stored as a UNIX timestamp.
Any help is appreciated.

[fenway]

WHERE exp_date < NOW() - INTERVAL 1 MONTH