diff --git a/backend/src/models/token.ts b/backend/src/models/token.ts
index 5481365a06..9569aee0bc 100644
--- a/backend/src/models/token.ts
+++ b/backend/src/models/token.ts
@@ -18,11 +18,16 @@ const tokenSchema = new Schema<IToken>({
   },
   createdAt: {
     type: Date,
-    expires: parseInt(EMAIL_TOKEN_LIFETIME),
     default: Date.now
   }
 });
 
+tokenSchema.index({ 
+  createdAt: 1 
+}, { 
+  expireAfterSeconds: parseInt(EMAIL_TOKEN_LIFETIME) 
+});
+
 const Token = model<IToken>('Token', tokenSchema);
 
 export default Token;