SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7173cfb43c716857268d404724a426f1e89fe5998611a38e98f23caf61f43397' 
  AND token = 'nyNj4l9oBSlUJ1hZDqzeGsf/KNGc2dkFeGCSENAzPYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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