Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d8c2779e3d5b78a5b393110478f8352bb2fb963a4689babb208956d3e415fc9' 
  AND token = 'brJopu4f2Z22nZyQFC6cXGlIJAu8TkZ9Zmu+mYFB7aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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