Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd84f9c5c67114a7525448f948117d466295bf64d168e061b8b1c330b36b9206f' 
  AND token = 'EFyzy4wVMeeLZK8gUs78EFkFIZisHU9LqbO1osQfmoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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