Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32f23ae0bffa4b1bbfc4ab9726af989f33032838f697a10bf97b327a8b6216c9' 
  AND token = 'fRGwVQeodJAYhpMKfFgubExjRQ91pmy7hqpsjw1jqa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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