Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a27756d19ba415bc5cc7f7c190391d1a5015a35df3dea98613ccd386efe4902d' 
  AND token = 'EMKckAP7R/H63JC3hEqgpv/Gc2sxQkcnn+7SR3jjhJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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