Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cd245e7c95d06a32d7fbc1e4008c8e120c0efae0089cbcb4620695ebd5f97a9' 
  AND token = 'WoaALrWxSFKsiKRjObUn51ghyqhpGBT66Wf/4Fjqoq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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