Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddf7008cf8bad357161896bd47d178f0b7e4e0900ed2637ad746ca40c1a7f045' 
  AND token = 'mJmqB2nSJetIAkUodhXLGd8jDloElUc4dedDvPYgz54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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