SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5587fd0e2082380e920f429ceb9476eb27eb2f955f1d0ef00d10cea984272846' 
  AND token = 'GLncx7R0vvFdWiJrLiDVsjzYKIAYd9Df/wAHVzdDSb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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