Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aa1873b5e3493c5e2b27ff9f385455f444b672c6ac385492cd1a061eb9d6441' 
  AND token = 'Ya80hVT2LEUTUBnr7HZ/xpMVa4BUXZ+Ixb+ia5ZBd+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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