SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed5f7ca028e62ebc824af92e184dbd71d6fe1cd162d16a910314ff17fb3c71e3' 
  AND token = '02l//aVC4H6SY7DyUWxepKsZkzTgs/ItnAPazReYhXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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