gistfile1.rb

require 'contextio'
require 'active_support/all'
require 'date'

contextio = ContextIO.new('key', 'secret')

account = contextio.accounts.where(email: '[email protected]').first

date_before = Time.now.utc - 30.minutes
date_after = Time.now.utc - 1.minute

puts date_before.utc? # => Yes
puts date_after.utc? # => Yes

puts date_before.class # => Time
puts date_after.class # => Time

account.messages.where(before_after: date_after.to_i).count # => 25