Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40bd302f793d968460129e2b970968ab0d0aef380d068906174510e6d2889311' 
  AND token = 'yaO6zHMcqMqBceHp3z/dBIOQ0nRtenaaNqj8ale8/b0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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