SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61ceb56870aa0e2a41e3b8069fa86e969e8493b7d0110324d2a1c011cbebd2fc' 
  AND token = 'Cn1McHjR2tcMBkH9V1BEwNbswhwMDUTrS+VosSm84/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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