Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17c2dfb671933f23150ee2076ec6a3b374e32229b017a740f673ed9d8b9365e8' 
  AND token = 'Ucw5PhRa3Sho7Q6a78E+ynkHT2Fc6HO4iQIIZ5hlBkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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