Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aa3942a60977ea040e34655861c3d7ec458c102d3376c4116c8a964d2f0fd8b' 
  AND token = '9nEisHqEX7ujrTdDOMUloXmdtDUV0SDULJ4l7hQKgm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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