SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3724778c2ea4245799da86af095ec60e943f1f091a4f177e404ebad4456c36fb' 
  AND token = 'YBQ53hbjugZ+vstQhR/sIIQ/Ehr9EJRxYY/DszqLOcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}