"by this token" is correct and can be used in written English.
This phrase is typically used in the sense of providing something as evidence or proof of a certain claim, or an acknowledgment of understanding. For example, "By this token, I solemnly swear to uphold the principles of this organization."
folk ask: What mean you by this token?
By this token, diversification hasn't entirely failed in the current downturn.
By this token, "The Servants' Quarters" starts as something of a standard-bearer for the misfit, the outcast, the oddball and the plain barking mad.
By this token, Safe House, an espionage film by numbers set in South Africa, might have been called "Spy on Kop".
By this token, Celebration is better than a gated community, but perhaps not so much as its builders would have us believe.
The dead can be handled only by a designated class, who by this token became the 'untouchables' of an otherwise proudly casteless community, a marginalisation portrayed in Cyrus Mistry's unsettling novel, Chronicle of a Corpse Bearer.
According to George Christian, a political consultant in Austin, "The governor pretty much has to beg, borrow or steal any influence over the budget process".By this token, Mr Bush was in fact quite successful in dealing with the legislature, much more so than his predecessor.
By using this token system, neither merchants or nor customers need NFC-capable phones before they can do mobile payments.
On the contrary, the political figure who evokes strongly positive feelings appeals, by this very token, to the most deep‐seated longings and hopes.
Alan Cristea Gallery, W1, to 24 Jan SS Irma Blank is an artist who speaks in primordial signs and sounds, abstract calligraphies and concrete poems that might be practically indecipherable, yet, by this very token, can hint at something like the unspeakable.
In spite of the small amounts, these refunds and allowances also strengthened uptake and delivery of the educational outreach sessions, as HCWs reported that they were motivated by this small token of support.
