$expiration_keys = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE option_name LIKE '_wp_session_expires_%'" );

            $now              = current_time( 'timestamp' );
            $expired_sessions = array();

            foreach ( $expiration_keys as $expiration ) {

                // If the session has expired
                if ( $now > intval( $expiration->option_value ) ) {

                    // Get the session ID by parsing the option_name
                    $session_id = substr( $expiration->option_name, 20 );

                    if ( (int) - 1 === (int) $session_id || ! preg_match( '/^[a-f0-9]{32}$/', $session_id ) ) {
                        continue;
                    }

                    $expired_sessions[] = $expiration->option_name;
                    $expired_sessions[] = esc_sql( "_wp_session_$session_id" );
                }
            }

            // Delete all expired sessions in a single query
            if ( ! empty( $expired_sessions ) ) {
                $option_names = implode( "','", $expired_sessions );
                $wpdb->query( "DELETE FROM $wpdb->options WHERE option_name IN ('$option_names')" );
            }