Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c02ec48fb2298364a06217d4b192f3c766f3ac104d50b205dc727e4d4d874366' 
  AND token = 'Fj8rckrzmyecNn4C0UwT1F6Wv7zwp5rN+TDtuMJgXHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}