Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87b416d7dd8905fe907badaf12540662feeb26ff26c471340ae2322fd8f90b4d' 
  AND token = 'Zfe0QvYGZHay2A6qQeoFJgBAZKaDbUK2Y/yguQ/1cTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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