Fix check if the item doesn't exist in the ttl cache

salt/utils/cache.py

@@ -15,6 +15,8 @@ class CacheDict(dict):
         '''
         Enforce the TTL to a specific key, delete if its past TTL
         '''
+        if key not in self._key_cache_time:
+            return
         if time.time() - self._key_cache_time[key] > self._ttl:
             del self._key_cache_time[key]
             dict.__delitem__(self, key)