Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '839ff158eb5967f1431a4ae6ad8b8b545d1760697919b8659013e168e050fbdf' 
  AND token = 'ewd5Ln6C4Ze574Ggsme6hlBMWK67czSyw+Hi9n/r738=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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