Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '871d2d0fa570a248a4e3776ed6c45e8b0b4a359f566243be5dae9f5f30dfded0' 
  AND token = 'JyMJRCFwswDSOdlUp5e/4BG8L6bUEWgX0BFGo33rS5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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