Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b31a18acf73212c5a9a31def32d10ed8dd871dbbc600a02fc857bf68264f6773' 
  AND token = 'WdOqNlyqfOhYvGma/06+gG0fn+3YR5WwRzc/gsyG0gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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