Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05cef5bce0ddb43b39475e7e5e273577986a5000e0d7d07de1b5253e28b63344' 
  AND token = '2EoTCyBDbfnYKTAY+bA7mfiysiZbBGtJ4HoAl7Y3bGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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