Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '817924536a1aea7e3100c5864066f87796ca160683714d1b09e59edcf1594782' 
  AND token = '7CeA7oNMefbhCZfXdx+00Wc77s8ta4he8yyh5rR9gHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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