Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ef6fc236d73bea7df3353fdbda545eb8ea06a89e8f4123b0cef6af8f25527f8' 
  AND token = 'NeS7EYqQMwJMdnwr1Ale1ahYq4+IGZ6dhbPeTQToKwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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