Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f11e9655e92280c01f09d857dfde1d174f34a7d304cebb68414c8d9d579832c' 
  AND token = 'Dv3E2MtcrMrxPUyBMxunI4dT8IHY7XBAmFZOQX/9mrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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