SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdc6507434669b2043a63f0342f8af4d5ac9584f5ce19e49c6ba958def8a58d0' 
  AND token = 'ojB6qCd90q08mZGDWeZQywSDLNTI7/a+ZMVSjSQAKUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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