Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f786ff97774ef32d1071b65d58de11d142591a87ba885f81142669fa93ac1657' 
  AND token = 'tuhwuOuLvzfVRuYTmnL+iSo2kcOSMJUMIzf7O1oCCnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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