Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da82f966a27fe9e8bc3cca4ee473796ff8703cd16f9beaea8df4fdaa188fb60b' 
  AND token = 'nnVv70gQUo9Ba1CVIPxDoGqt196ESuOATdrGlVW0JJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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