Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98e83d3a1cf0c8d065351a8df8fbf3312d080915a32da16c07f8c27875eacd2d' 
  AND token = 'pZHMhthwSp66g7It4cyiLoRHkW9sft0ge86p7koIfJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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