Ramzeska

<?php
    private function LatLngDist($p, $q) {
        $R = 6371; // Earth radius in km

        $dLat = (($q[0] - $p[0]) * pi() / 180);
        $dLon = (($q[1] - $p[1]) * pi() / 180);
        $a = sin($dLat / 2) * sin($dLat / 2) +
                cos($p[0] * pi() / 180) * cos($q[0] * pi() / 180) *
                sin($dLon / 2) * sin($dLon / 2);
        $c = 2 * atan2(sqrt($a), sqrt(1 - $a));

        return $R * $c;
    }

(SELECT * FROM `good` WHERE qty >= 4 ORDER BY qty LIMIT 1)
UNION ALL
(SELECT * FROM `good` WHERE qty < 4 ORDER BY qty DESC LIMIT 1)
LIMIT 1

SELECT * FROM (SELECT * FROM `good` WHERE qty >= 4 ORDER BY qty >= 4, qty LIMIT 1) as g
UNION 
SELECT * FROM (SELECT * FROM `good` WHERE qty < 4 ORDER BY qty < 4, qty DESC LIMIT 1) as g