SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d72c8ce8f4cd9d3091e1e16bad27e9ea90e11457f2526112df6c6e430fcd864' 
  AND token = 'eR3953S79VvODB6ZmDhP/swNnMKbJzgstFz5xvEk0gM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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