Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96bfd11e2ac22f23fb285d745dc77287bdeec253c49b41f24f99acc8c3f03e9a' 
  AND token = 'JlavifaXeeCl/ub1Jx3UOX4oHz4WjL7X3OTEoR6Zjf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}