Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f01912853bef3cddb36e1702bfb573fe905baba247a1b72067b3f2cada5bc2c' 
  AND token = 'r/ZD44XfkM0U6v29w0Pv03aWk/5FpNB8TUlki4u7Xg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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