Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f531ceb60eed08eadc3f0aa8424a8328447e9efcf94647536d773d37c48b846' 
  AND token = 'X1BH04YApH0ADnJuXUuwXft6P+UssqRqLwATYMoaLUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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