Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f2f091e4ca2afa02aa946f299ed928e9613020cf9870921a0c8906d015089a4' 
  AND token = 'kxVZFc3xzs8OHW04xHwHCe+ZbuqJSx/4XFXbZdE9WKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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