Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96a7d7d81d5352011e62179469907580b65c90f420c2e62fe822f980379f857b' 
  AND token = 'ZFP4MIIK02jUh/3r0dWuwMSSObgQSGoQEQWs+Tk6oEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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