SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af98e3ce77b454991c50a2c7795db44b824f4003f002d7fe062218fd8b070fe5' 
  AND token = 'ahqJuzsVq6V6WJavSomhRnHF2cVDgTLAGSXIxczs6iQ=' 
  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