Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b2b634ef46c77c995ef48084fd93424cce5dc165fffbe425f654f0430255ca5' 
  AND token = 'op9Esjn7wEXwfplFJNaiNCO5ggf+fo1ioIzrq7MhmZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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