Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aa35908af155fec67668d98718adc5976da293513a35078f895166b29e4da0c' 
  AND token = 'XwH8kqGhc2SFbye8MLRbvD3l/8fabdmKjMs1p/1Ux2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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