Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '210c488506430f4a0f0f96844f1ad7cbbe9df7de3a0bf01077e54f49869171bb' 
  AND token = 'IEoNwXb0UrOegl2tcENQBXCYYIIGB96tjn26h16hDjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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