Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05e8cb5eaf93624bbde72e1917060536539ba1d71df6f086fda043b67b07de67' 
  AND token = '8Ic2ZM5ywfKcwbjHggVq1OhfnL6dyLNzMNMWVjHkp9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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