Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b83874b7931979a96a1f995a3fd063fe63c9aabbb9c3691a0d400dd3499144f' 
  AND token = 'N6SQjGuWbBuBNcPT1jDUWclUZbi6ch6J46ohxVokBwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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