Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82387124e3d7ca104b5b547ef33674c524404181cbfce32478ac143c018c6a42' 
  AND token = 'CuAlLO0K54VpT8HCbEPjmAKXahQtDcNb/LQVVb2kyds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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