Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '839bec2d1151606801b88f40273661b1ed65cce06773c1795d8dbfa6db53846e' 
  AND token = 'Am2oJ/FJQH2N/MB8PElWuT8n8IWLZjR7TVSFSfm7fEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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