BookStack/database/migrations/2020_09_19_094251_add_activity_indexes.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class AddActivityIndexes extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('activities', function (Blueprint $table) {
            $table->index('key');
            $table->index('created_at');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('activities', function (Blueprint $table) {
            $table->dropIndex('activities_key_index');
            $table->dropIndex('activities_created_at_index');
        });
    }
}