Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72b2b6e8b4f9de220db7b54d214a24712c68ff3337a26fdfc8cec2d86514c61f' 
  AND token = 'v/JLflrTFp6adg+bdUtwZ6uLaMnjVvQqrO+ukENT1gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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