Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c609b583620bc695fffdc746f7435310fe4b43d5d78760b39cc6eb81bf395025' 
  AND token = 'POFHMk0VlyRbyy6eS/eHTYO9AgPNMP4LwktEYvYlZqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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