Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd3e0d8b9636867d1cb6b0cfbc4a8d682c3354701d9f123925e2f48fdcfd926d' 
  AND token = 'g8LyGeE1lhVy3q4hZcrGtbJrm0k8IgEXonaTonL16ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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