UPDATE xf_user_authenticate

SET data = BINARY

    CONCAT(

        CONCAT(

            CONCAT('a:3:{s:4:"hash";s:40:"', SHA1(CONCAT(SHA1('new-password'), SHA1('salt')))),

            CONCAT('";s:4:"salt";s:40:"', SHA1('salt'))

        ),

        '";s:8:"hashFunc";s:4:"sha1";}'

    ),

scheme_class = 'XF:Core'

WHERE user_id = 1;