Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da59d14f412055ec1df841d12f2a4aca3ca7f6784e898a8b0bad0cdafe421f2f' 
  AND token = 'dCcG9qZ9QXUBh7HRdQplmCLWWpkYv64V72exCV6mgYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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