Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a88634c330b76c0068aecfdad16634ea7d76c12948eb708215ec6d1241a11b9c' 
  AND token = 'adS5mpOVmIupThmRQzpI0PrYfDg3jI5jaTinxTSTSzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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