diff --git a/cashu/mint/crud.py b/cashu/mint/crud.py
index 06ed9ee..313dace 100644
--- a/cashu/mint/crud.py
+++ b/cashu/mint/crud.py
@@ -169,9 +169,9 @@ async def store_keyset(
         (
             keyset.id,
             keyset.derivation_path,
-            keyset.valid_from or int(time.time()),
-            keyset.valid_to or int(time.time()),
-            keyset.first_seen or int(time.time()),
+            keyset.valid_from or db.timestamp_now,
+            keyset.valid_to or db.timestamp_now,
+            keyset.first_seen or db.timestamp_now,
             True,
             keyset.version,
         ),