Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd26c527890a3015f10f3e036b654e09d5c9b13cf0bc7328bb08078bcb1f1c0c3' 
  AND token = '222lLectCTi81gqb4Cj6xwLfvq1ymIwDYXjtDmdPBz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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