Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21767864e145a42d88dc1a106ceb6e0bb81b562e3eb5c3c845c77501df9eb24c' 
  AND token = 'XMUi0NpA/hF3vA/encEXSYjDzT6KeVPNBLq1HkAhZkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}