diff --git a/lnbits/core/crud.py b/lnbits/core/crud.py
index 195748a..a06e045 100644
--- a/lnbits/core/crud.py
+++ b/lnbits/core/crud.py
@@ -114,17 +114,22 @@ def get_wallet(wallet_id: str) -> Optional[Wallet]:
 
 def get_wallet_for_key(key: str, key_type: str = "invoice") -> Optional[Wallet]:
     with open_db() as db:
-        check_field = "adminkey" if key_type == "admin" else "inkey"
         row = db.fetchone(
             f"""
             SELECT *, COALESCE((SELECT balance FROM balances WHERE wallet = wallets.id), 0) AS balance_msat
             FROM wallets
-            WHERE {check_field} = ?
+            WHERE adminkey = ? OR inkey = ?
             """,
-            (key,),
+            (key, key),
         )
 
-    return Wallet(**row) if row else None
+        if not row:
+            return None
+
+        if key_type == "admin" and row["adminkey"] != key:
+            return None
+
+        return Wallet(**row)
 
 
 # wallet payments