Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'ae25d5525b6e1aa98ad1486cb76f86815781e486ee8dff3103a2229c4a8d7e56' 
  AND token = 'hxduOvPo05JgXGdVqlABOI1kRvam5gJ40qeJt8ROBDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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