Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77df301bb6fd05b5c8fb27048442640343661d63feadf25b327445a62150813d' 
  AND token = 'ORGvt9/Epxo4cwgBo7OwaiO0m3K7RLnFNmypqjQ92dQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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