Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6889c37e7babf3e8f772f4c15df7054784ec87c83ae6dddf7e7342e1692ddcc7' 
  AND token = 'vraqYDX6lIrJXRcZizoWA1jzAfKqh9TYids0gQE9hkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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