Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '730a305035ee463f0d3e88f9c3657383544a20b4f87373fd6c31c3754a99bb85' 
  AND token = 'Te0EdqsD+u68CRGZlxSlVO4BKEyhN9tIpfTQLzwN+u0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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