Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fa3ac35f2f23143a8401d04ab63cd15e9c5016bc9ddb5f07cdc6f3f3e599127' 
  AND token = 'Y/1gDez83m5NttROgLku/NcsFvPyXt72pBAcGqHdy3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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