SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07190bcdfdc06dfca7cfae27ed07c837a629ed656f459df96910866d720dc840' 
  AND token = 'mQFM25rsVMuCVZG8sxwY+YfMtZuqvPi9PfzR38Z3cUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

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