Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5b9996463e440f5f0c8556ff261852caaf02632fb1fe9ccdfec15ee81baa1e5' 
  AND token = 'iyotMWO9ZkimGfBOGD5tRuMkrbqnEvJ9anor70LoKGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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