Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8fb932bf470a912f1867e4fa51f8a8183195f3cce33bc58a4f6873c3d4754f0' 
  AND token = 'XCXOqKnYkpwfkNlVx1xV8AxAuaC7qUufoDum16PQXjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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