Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc6a3da8af7be7884b4502dea229b9452c561ed148a1697a0cdc9f2dcaece41c' 
  AND token = '7TmC2o0bA0pGQwudwG70C5iOJ4cSFmsKUh7Uq7Uu6Jo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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