Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdce03894857e49c641b9cba67a499c8cacc11e8bcbd349d0ed876f6aeac46a2' 
  AND token = 'c4M7wooWJLzYXxdxjb3VC1fCKdapxxIXsGcTcUZMt+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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