diff --git a/modules/backend/database/migrations/2013_10_01_000004_Db_Backend_User_Throttle.php b/modules/backend/database/migrations/2013_10_01_000004_Db_Backend_User_Throttle.php
index 6618d8d55..31baf43f8 100644
--- a/modules/backend/database/migrations/2013_10_01_000004_Db_Backend_User_Throttle.php
+++ b/modules/backend/database/migrations/2013_10_01_000004_Db_Backend_User_Throttle.php
@@ -10,8 +10,8 @@ class DbBackendUserThrottle extends Migration
         Schema::create('backend_user_throttle', function ($table) {
             $table->engine = 'InnoDB';
             $table->increments('id');
-            $table->integer('user_id')->unsigned();
-            $table->string('ip_address')->nullable();
+            $table->integer('user_id')->unsigned()->nullable()->index();
+            $table->string('ip_address')->nullable()->index();
             $table->integer('attempts')->default(0);
             $table->timestamp('last_attempt_at')->nullable();
             $table->boolean('is_suspended')->default(0);