Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd8fc322b4031b2d960d051a40c6ad24df33f8730c27ebdf8826cf404ee8d0e0' 
  AND token = '5VunnSX5puetrXDMf3wzClCJ4qDDe+1lC5UldegCQ2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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