Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17556848734e66a109ff7c6274837da2b6267a3eb75c56a404468a1238a0fcf2' 
  AND token = 'd08FUZAsXZ0NQ+ugVTvcpt3ZyBxJTiBiJH2NqG5TrVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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