Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af3af3d2d05965cb5304c7d315c872d9b08ed3aa71ccb209ec9c2cc78e20f26b' 
  AND token = 'eiMUNRDndHtBv7CToZ7pawmI9baQ9q2dfwHzFmhi/aQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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