SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14be7ee056c3c0a73fe79b82e0ec4e62000f8b41f95d4844339d12fb921e57ab' 
  AND token = 'RNf9o3rLbpPy+sVI8kTd8iP0NIv+5KNOQiZQRusgyLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

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