Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdbc043772f44c2599e4ffde70950ec81dc2175783f9d0961a26fbce7bea9ebd' 
  AND token = 'CDtPHfrEDBnFDN4Ph5i3P9oIYYc633e+pqa6iTdcCa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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