Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57c302ec34144736425f1d8fd000840aa312c6ef91caa44058e6b87c47a1bcc1' 
  AND token = '7PVa/fywTN4m6eCDtwu+puYiaAxfEzEY/PKXBODgNws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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