Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a559f9a6b8e9ca69fa11dae88303e73e6c9d26dc12cce28f139a3cee5392b666' 
  AND token = '5pJaZRjJqzGlhQhm8Kh/frsDj3a2k96khzTTiwub60E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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