Log in to My Account in the Library catalog. On the right side of your account information, you will see something that says Your Status. If your status says OK, then your card is active and in good standing. You can always call your local branch or Main Reference at (505)768-5141 and ask whether your card is still active. Please make sure to have your card number handy when you call.
If you no longer have your card, you can replace it in person at any time!