Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70ba164234efabca8d424c3c2121691c9b8cf154136bfd40fdaebe6e62eb45b6' 
  AND token = 'RiqDrbz1fMYa/lOcv+pqMYcx+U2BmybJBnGaqWtabvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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