SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda3ce1a0506f5dedcee8df44a611d5d02e57cfe7f86e6bc81f52fc0a4c147f2' 
  AND token = 'zEfZuGc7ykp5KZhNFzZcs3xatSSzo/BFoVcdfrBN09o=' 
  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