Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86af14ffb33d945fcb527fb91e0391a948a58d7b134403a8c974c74274848612' 
  AND token = 'bGWsIZOl3qaq8glRYDKHcNoanciOEVh9V/PbwOTU9f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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