Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2da62228d0583de84dde8ed39776015333928d83b7548d6eb849c9ab590bfe20' 
  AND token = 'Qd/R564B46aFWhjvwWdmPe/X5WgYD14iRzqyA/lWwdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}