Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e107d71731efa6cc7fa093f3aeff5aff7fd2b9821e89f6085d7546839124ca4' 
  AND token = 'fQaYW+vMlCzsE19kJaEc1HXSoyWoJ6BuQRbMbApIgHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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