SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aafe88facc352faf64960fe8ad7472f9a8cd2a1ea12088c7049e6deabd1a3ba9' 
  AND token = 'CfQaVSi8I80F2iYZcu6JF7A+o7zWUoBIZQoHY9ZJvL8=' 
  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