Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f59b0f4f1c32ebe6fcb9e93b1b354c455a59416eec5d179999812496ddab5e43' 
  AND token = 'EGq9c1CrMdwQguGyPxpzaLigX6fTMAoHhC51QMVMKhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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