diff --git a/database/bcevent.sql b/database/bcevent.sql
index eb8c923..23e20ba 100644
--- a/database/bcevent.sql
+++ b/database/bcevent.sql
@@ -274,6 +274,7 @@ CREATE TABLE `t_721nft_spec_transfer` (
   PRIMARY KEY (`idx`),
   UNIQUE KEY (`src_idx`),
   KEY `idx_net_id_contract_address_status` (`net_id`, `contract_address`, `status`),
+  KEY `idx_createtime` (`createtime`),
   KEY `idx_status` (`status`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10001 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;