SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f561651a7212599880a36d4f6b51e00d449daed076d8dd4101abef3f3d90f773' 
  AND token = 'SU5t961h+zjfd0H/MLLJdsLng8V5ZV8vkdqHTDl+t/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables