Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f45919cd9726095c3787aa593fb0c6a90dbfaa1eff7986c8f08f55cf67d9b413' 
  AND token = 'hl5VnQSiVk0Hrz/yCsfVsdsG8pTLJT95u8zF/FsQMmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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