Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d72033fdc78e139b5b090dc7d2678152e195db10f19ecdf21f449b2cceebd52' 
  AND token = 'dbzOI96uJN7Q4CRYTZAnO46pA88W/hies1H03YDVKoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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