Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6decfff78f143110d8c15ef930badb21adb96f85f79668b891c18040ecb3b713' 
  AND token = 'jaAKM55zqJZwTeGorNZIs5rf/sI6IfDawsTelLfuy1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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