Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a1a8547d904ecab028c7050bc73eccbc5eeee16ca6f5239d0d6eb72101e531d' 
  AND token = 'txEdUf67LPUc4gK2HeQgm1If0N5An705sN3yDd6m3Us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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