Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1b74723efead69a15e5924a8cf5d8110fbd4a9dcee710109c5cbfce2dfe9e9e' 
  AND token = 'qt8jITJEVqJmLSDGbZutIGEAd/n+NKkDoNxJ27RrhwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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