Encrypt module; Is there a way of using db_query() on encrypted values?
You can see from your DPM that your encryption method is returning an array containing several different values. You can't use an array for a database field value it would need to be a string in this case. So you need to use just the  encrypted hash string from that array in your db_query e.g.

array(':email' =&gt; $email['text'])