add db index on oauth2_access_tokens's (token_count, created_at)

Signed-off-by: Julien Veyssier <julien-nc@posteo.net>

apps/oauth2/lib/Migration/Version011603Date20230620111039.php

@@ -47,20 +47,23 @@ class Version011603Date20230620111039 extends SimpleMigrationStep {
 		if ($schema->hasTable('oauth2_access_tokens')) {
 			$table = $schema->getTable('oauth2_access_tokens');
 			$dbChanged = false;
-			if (!$table->hasColumn('created_at') || !$table->hasColumn('token_count')) {
-				$dbChanged = true;
-			}
 			if (!$table->hasColumn('created_at')) {
 				$table->addColumn('created_at', Types::BIGINT, [
 					'notnull' => true,
 					'default' => 0,
 				]);
+				$dbChanged = true;
 			}
 			if (!$table->hasColumn('token_count')) {
 				$table->addColumn('token_count', Types::BIGINT, [
 					'notnull' => true,
 					'default' => 0,
 				]);
+				$dbChanged = true;
+			}
+			if (!$table->hasIndex('oauth2_tk_c_created_idx')) {
+				$table->addIndex(['token_count', 'created_at'], 'oauth2_tk_c_created_idx');
+				$dbChanged = true;
 			}
 			if ($dbChanged) {
 				return $schema;