Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da09016e940a6441b837e020b541230d1ed1f738f833536c7fa0849f87c610d4' 
  AND token = '4qwC+arZ83oQZhadovEkRAxGOlaWIYe6rcFYhLeiXcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}