diff --git a/src/database/migrations/1727258557893-create-index-event-logs.ts b/src/database/migrations/1727258557893-create-index-event-logs.ts
new file mode 100644
index 0000000..496fa16
--- /dev/null
+++ b/src/database/migrations/1727258557893-create-index-event-logs.ts
@@ -0,0 +1,18 @@
+import { MigrationInterface, QueryRunner, TableIndex } from 'typeorm';
+
+export class CreateIndexEventLogs1727258557893 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.createIndex(
+      'event_logs',
+      new TableIndex({
+        name: 'index-tx-hash-lock',
+        columnNames: ['tx_hash_lock'],
+        isUnique: true,
+      }),
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.dropIndex('event_logs', 'index-tx-hash-lock');
+  }
+}