Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6564c5cbfce2e6b9655e1ddd34b200cf1f7474fa456a7e45d70e5b709071207d' 
  AND token = 'cm51Vi8TRpEDBAV+vrLZAq8KzAstpPRZWj/mlfA3W/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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