Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19a157a304a73d642fe31d119e7a3b680469b02d5d10e85f6ccfe2fca43dccfd' 
  AND token = 'W+4llDnix8+3DN5x+EdL4qXj/wI/NaNtPl9cecwN6H8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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