SELECT id, user_id,
(6371 * acos(
 cos( radians(-30.053831) )
 * cos( radians( lat ) )
 * cos( radians( lng ) - radians(-51.191810) )
 + sin( radians(-30.053831) )
 * sin( radians( lat ) )
 )
) AS distancia
FROM enderecos
GROUP BY user_id
HAVING distancia < 25
ORDER BY distancia ASC;