Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb344f4a0fd72ceef631655fc391b6dfd33c31459ca0e5a87e20eed76d360404' 
  AND token = '3PV/cYly96sfN3PHoLT/Z2mdOnJL7lUofVBZRaXB6x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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