Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d48c3bf12dca4dfcaef7390961b577e40d307cb58ffb15628d326c711feb80b' 
  AND token = 'QeWIHLZn7SxErRJ3D1RbUzpWWj4zskxnYfOr94LGa+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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