Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffa54a64d20204f529f4e4a94b9ef396b36bf2de935b4274b12b7f2414c9e6f7' 
  AND token = 'F18JlEqt9PiM6pgUB5oLWS9lpAp174DPv0DWRtQSVBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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