Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1a7dae489f7cbfb9ccf5805f91a49e8de99e26959c29807142752e4951e6fdc' 
  AND token = 'CS3bIc+5ayzHepYWzDeKkb0gA08iLmhDZGrW5lGR9+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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