Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57ecf6d98a33979a081f6af7b19f39186b93d351797983675cc3829d24ec29cc' 
  AND token = 'YTGAheImEmJnCJ3fkLjH1bFOUavu04zAHcXpH5KRb/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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