Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf564ed77ec4e17ab0b2dcc7e993b1290efcc50b867c53c3a412dd311d7f4949' 
  AND token = 'KI8rZ0uoHNM+APnHCdn90O0GNfuN16d8Ybds9qlyZyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}