Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d71ffd27a4672a9b96ea94e2cc99308864f31caa89ea0c9a0989929ace34e8d' 
  AND token = 'Wd/qvsK7Ph8roi2SDfLeiiSkTi8iNrvJcv+R1UXBauU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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