Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ed5f7cb6fcc70f882d9fe63bce49172dedd24a43606b3eb84380bbc0168a4a7' 
  AND token = 'WYUOBVpkEwFMF4A8ylw/h3Adik5VQ2xNkZC+4pMNtYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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