Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b477a535e6e878fe1106f7c0485d506379e4c51c364520fe4f127b8bdaaecc44' 
  AND token = 'UrHuOq8w5iq4+JhxpGbo41VcWWSwj53efvLpeoo7bCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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