SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '062d6bba2346a64edf2ceddae6ad3f7b4f1f18d0c2e94a345c0019ef69d65daf' 
  AND token = 'HH1xKHBEiujkM4XgSQXhTdb/vCvuDmbgBbBHkZOGAHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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