The API key is associated with the signature key. It does not have an expiration date, but a signing key. If you use a debug key signing key, it expires in a year. The Release Signing key should expire no earlier than October 22, 2033 (I have been using it for 100 years). I donβt know how to check the certificate validity period, but itβs relatively easy to get a new Google Maps API key. See My Google Maps Guide
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