Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5697192f4b8e521a34f75f185c7a7b79f7d49970ca91f7f17c42436d70201976' 
  AND token = 'a9E8wXkoCtnqHoeFimUlEXlsnGO0wOjMFteNYwokUHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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