SELECT
cod,name_rus, country_id, region_id, rayon_rus, (abs((lon - 135.15)*(lon - 135.15)) + ABS((lat - 59.183)*(lat - 59.183)) ) as distance
FROM city_guru
WHERE cod < 100000000 and
(abs((lon - 135.15)*(lon - 135.15)) + ABS((lat - 59.183)*(lat - 59.183)) )<10 and (abs((lon - 135.15)*(lon - 135.15)) + ABS((lat - 59.183)*(lat - 59.183)) ) >0.000001
ORDER BY `distance` ASC limit 1