Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '634d5b819e8d090b33fd173b9898b03cb3b141353820fdfb08f94c02dc371d37' 
  AND token = 'dRECtEZTHzmBK534veXPejIG0N85h/Orf0EuDSU5Zws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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