Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cad676f09b76a13d8ffffafb633f25663a3f2775f2ff0b1ea4ef8b773771c8c9' 
  AND token = 'RCVUNO85+Pfixl2iMOJo+Xt85YM7BlfaV5PWA++ySTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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