Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a68e6467addf1425ccd88a7950e971f75c16745aec86772a1e5f061282b89257' 
  AND token = 'DCvKlLXy4yldzRelMeFCHVAwffIJDE5nEMqycXSwtmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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