Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e769fa170fc32debdbc61871826742f40411dd852687620b883f487e2d7e2273' 
  AND token = 'qfnEYStBq6BwqNblGHcRxVWGwSdT29n2SdN2dyvsmOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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