Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69b49a84023f004a798a6de30b0e5d830b9db117ebeb27c75534e7be64eb5fa6' 
  AND token = 'kRsu8lFalUaa9b1Tv7U3MOsWl1v/mvRyobJZDN30oAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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