Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ea1fc3c4378f1024eebceeb6ea1573477c62547f12d10830d93f74a32a9bbf2' 
  AND token = 'odEKBF4+LX1m7m9Mh8L5T3dSUXrP8Md0PS1FQpTGpw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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