SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbaac1ccbfd61e436c441986cba50c786135b7bc0898f93f5bf2cb0d88cc5a85' 
  AND token = 'wvY0JEdJ/62NTLfGRsM6WQNoIBEP8FhwLzKCUjq1aOk=' 
  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