Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b149544eceb13b2b43bf52d0bc3a8b5f103aec7c44b308fc5e1712dbcb7ff3d' 
  AND token = 'RaFGxRadXPMTtlVAbVGcOo6QV16KC5eHj0TunWsNK+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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