Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd951b496f0e0b5355bdda3739b797dbc67597a2d9f1f614d6932f7e969043501' 
  AND token = 'rugiSVpXVvBZmc/PYTaCSwqPDk5c7A0xvdThykAlpI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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