Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2d897a88ee5f7063a997892aa9ec793240464302e37c9a8a674b499778f29a8' 
  AND token = 'dJ+uhQsOVhwejN8RRqzckvIxTmIWRSACVyLqVaLeVNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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