Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81aec8f0de68159ae989a1d9eaf597dd2e3d53b523868d9bf7960ddebb3fcf1e' 
  AND token = 'jhEFZBtXJyOjbqo2UD7z9Yjp5ZJ7kaIQ7sfxUSXydH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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