Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae3e4275f8eb28465934f660be51edfeee4d6e0d478f2626217e56255f9cfd6d' 
  AND token = 'ymPGJlJoRGc+a6PQ+xjmhyx1D4LJzI9ByEVkaW/8vzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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