Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cb4d097bbd19a10e6f330bfab12f1e62f35d0daa13be6041e69d022144af814' 
  AND token = 'wNMOPsRGhFS22Mkn8/0mk2r4PtCX8QkqGElGkVuhGSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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