Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bfbdf883eb8ba7e2e9743f60362a8e77c84c8f47c88e972b77075fb19b95c12' 
  AND token = '1EnWr8ITzFRDQuz+LfONJuy/7LTSkjpwfuT+3KaMc1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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