Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87e4e658db609910fabdbbad99e4e699e8654bdbaf1b647a70b8db6b87d77c67' 
  AND token = 'Y5eZnPZfeH4/5bD8EXmA+F8jgSnrNMDMFjYdszBac+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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