SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02a85c52d14c2183b386a6106dabb6621559d91518b1900bce49c36fc5abb42b' 
  AND token = 'GnOq1bgHGBlIkJo9TFyCrhel2m4rOQZPgOEVQCvV3+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

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