Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e265d5f71cd148b75585e3e76cfb8b0558d10c1f3b60ffe280bc58867a81c24d' 
  AND token = '5jBFVcI325qTHAmzR9bUtzBJ8JgxvIcs7xPQryn3lvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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