SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61c14d3d1b0c735a4fc5409816ddcb4d8f58742551a25e6d0066164fa687d2ff' 
  AND token = '3IK8qmm2JST8b0o9IB080DUXn16nyO706oeaq3Yh1lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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