Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dd86a27d713aeb6fbbee590c05b3b0d2ac17ac58a5d0e73e36fa3eade3f930f' 
  AND token = 'Xh5nkgGOrTKUbQHYrTXiDYJwisatJdIjP/3DTHcOfAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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