Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94b8a155fd0fe62f72c8e5dadecc72044732465813cd040b70bb781273a3c819' 
  AND token = 'pbmM34jNqMsFCYEESmjsap+4iFSscZS85Jmnj5PHZ+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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