Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16719f06d2ef8a67dd74292ef08adf88c6d7f6b626e6db9acef33cec5b4ce445' 
  AND token = 'c48/eqgB/4yNtrakuy70GXQdfTCl7aIBcdm5/e1jp8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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