Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c532cb6eb927583459d4d1090c8d89465f07620a51dc92659403cc250ebc2cb' 
  AND token = 'kVf9smKA7qGvWl6M767XPvRqKyE3RUM66vlc3dWSB/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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