Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9e2227d7df5bdc366f73c39815ce5bc3773602f9e320faabf1a3f42ac00e6e' 
  AND token = 'Qs71bk4WpApaGeZlQTHH2tqRK6WMZqHVV23ew1IW7AA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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