Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072c4a83d8b06a5bbb93d5fec12aed8a9490d74f88dbeb225f29c96dac685713' 
  AND token = 'ED0tENZmyX7IvIG5QoLKj5sqbp2nEXoImbIcmB7zG+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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