Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6277f95802f0556df4c8c5a5a2d52f612dcbfe73c731d0c4ebc347c9b57b6214' 
  AND token = '/rGNhwHrumGCgErmnDl399na6GkZaJgeOWdHcwf5Mf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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