Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '449b3446bb18f1ea4f9252939f14886bca37a86c1898b7fae731b6bbd4142411' 
  AND token = '27H+PYO3rVg6H91/jwiXn9XiDoP0joZtV8sVXRDAUI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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