Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94f3e3cdff4fb41f425d8bcc00ca559eb9eddfb5e4db9a304366f46288218913' 
  AND token = 'VzbTrpW+byflOxSVNSC4TIlOX6RO4s5Cz5/esF1MRnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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