Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a40f432aebc48c240f59ebbbdb992910c19675c9d964c8a928dcb7f933ba3a' 
  AND token = 'eWTHJFE7kynAAnwCa/4KblPKLXZjcVhNhJKSZ97oqBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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