Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd16a5be662e0cb294eb2d2acda2ddd00440a6f98fa50516cce2d0b489a8279fb' 
  AND token = 'IQvwOMPSo53QTvE45k9LEzMMMs7lGGyF81K2/hvhU1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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