Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b9389abf6446d20260b5e0773387b38a12e7138d60879fb4ea2685b90f42931' 
  AND token = '312+XDF9W7z6c4bC9j/9lWYZIq8sDyyRA73o6GA1j/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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