Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f30e2118ba3ebe5d2b6dafbf063d18ca2fa4b89cfc7cfa4b3b03934206d3747' 
  AND token = 'Z2Rz7xXTjIzwzs6qkc5js2lRy3jTR+qAkht8yHjucig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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