Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b615cefe5aa3af4ae76cb57a5359e43699b4a101c2b3cb6fc93c3616db59030' 
  AND token = 'lFjjnlvY02EUlDaYovPDCdovc9jDfTPMaFKQ6OHtUpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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