Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d8c4695289db829451b45dead998859bf60b1eadb12f8b9ea36f8a7b82dee4d' 
  AND token = 'nmJpvSFNlL96reWe4HVqQpmYe9VI3RPY1Qucj/hIi+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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