diff --git a/db/postgresql/schema.prisma b/db/postgresql/schema.prisma
index 4ade7cee3..533f2a68e 100644
--- a/db/postgresql/schema.prisma
+++ b/db/postgresql/schema.prisma
@@ -275,5 +275,7 @@ model OidcState {
   codeVerifier String   @db.VarChar(255)
   createdAt    DateTime @default(now()) @map("created_at") @db.Timestamptz(6)
 
+  @@index([createdAt])
+
   @@map("oidc_state")
 }