Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '208a0a910bc25d95a129d49272659072531ef156b6fb9c328c4666249c4334a7' 
  AND token = 'tfMp8/5G6z5Jhn/nGen2WdOhB1hfKDwW7UcgC7z5f1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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