Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db0fe85096eef41ae262bef2981790def84855274db28f109b675570a20929a9' 
  AND token = 'IzyntFftxUKLk6hC+y607l9Ii1YFtnff1iHy41JJXP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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