Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58000754d1a43dbe2d881a3aa098a8e23a58bc843f6b0e304ca6235f2396d533' 
  AND token = 'yroB5J6Z0YgRO/XI3AMLushQqYl//d8hkMKYMNT/Eu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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