Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9214b4cbcdcf854b09223a46324d6e66aa79c40a2dec0f224201d1bbb79b9b19' 
  AND token = 'wF8hxDMg3OdmM9JimYgLSOIEIir6Yr3qjF43Gn3bdCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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