Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea5b59c7d19b16c68a34e5fa913ba44e6ccea729f7d862041b56946992b2566b' 
  AND token = 'RyQtQj42TB+ONwEaQx57b3w2HxQCsujj+DJrYcrxdrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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