Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25771a32d8c4701cbf6ce60fdfc4257474c8fe5228625f94cb54fc61a1705e36' 
  AND token = 'LKN8JPZaUuFyijbjyh43pxsiMI7lIBlej747USbUjvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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