Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e232d2e185c6dea43e89a4b711e225c53e1ce93c6214d8f2c9bf581a7093b1e' 
  AND token = '1UuZL6etDpXYj4YQkJSROrs0mFjRk+Hja4rco7WWZEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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