¿Estás buscando esto?
EDITAR:
INSERT INTO `clicks` (
`id` ,
`file_id` ,
`country` ,
`date` ,
`timeClick` ,
`user_subid`
)
SELECT `id` ,
`file_id` ,
`country` ,
`date` ,
`timeClick` ,
`user_subid`
FROM
(SELECT NULL id , '1500' `file_id` , 'Canada' `country` , '2014-05-24' `date` , '1400934475' `timeClick` , '7c282b9227328778680d5826e01f6d' `user_subid`) a
LEFT JOIN `clicks` b ON
a.id = b.id AND a.`file_id` = b.`file_id` AND a.`user_subid` = b.`user_subid`
WHERE b.`user_subid` IS NULL;
o con NO EXISTE
INSERT INTO `clicks` (
`id` ,
`file_id` ,
`country` ,
`date` ,
`timeClick` ,
`user_subid`
)
SELECT `id` ,
`file_id` ,
`country` ,
`date` ,
`timeClick` ,
`user_subid`
FROM
(SELECT NULL id , '1500' `file_id` , 'Canada' `country` , '2014-05-24' `date` , '1400934475' `timeClick` , '7c282b9227328778680d5826e01f6d' `user_subid`) a
WHERE NOT EXISTS (
SELECT 1
FROM `clicks`
WHERE `user_subid` = '7c282b9227328778680d5826e01f6d')