Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65430761df3fd1f157be3f571d2874d5964f638b58b2573a55362bf3e0a8b5fb' 
  AND token = 'eIOjoC0VpFjLIJUtA9r31IYWhHV7WvIETmgi7bw2XM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}