Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '342bc43fea3464353158e43694852b50ce80215b8e8f8e442dc77dc9f91a3cc3' 
  AND token = 'R7OkCNu+OWbe32wxJ7mEFIynWEpdKU32609FAa6msZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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