Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6299ae2cb3e7e51469c7472dcda96282d1170fbb04aece506d2880d714fe19c' 
  AND token = 'lgU0SEZoOWW5KkGC6UxdKtba4BDZf8IJ1Flw5pn7qUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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